I once had a museum of worms in bottles..made the mistake of putting them repeatedly in rubbing alcohol.
I even sent some across the world(china) to my Dr. in which it took 2 weeks to arrive..no good.
Formaldehyde sp. is best. They need the DNA/ genome..I guess and the eggs to detect what species it is.
I was keeping them for I was madder than a hornet..the DR.s and their maltreatment ..still today this day I get sick even contemplating having to see one again for any reason.
So having the bactrim on hand was a blessing for me for that bladder infection.
Anyway...I am my own DR. these days..with the help from my DR. across the world..He cares and is to me and many others one of the few DR.s in the world that cares or know their worms...I have had to use the process of elimination..
If I had diaherrea why I cannot spell diah and some others LOL(chronic) U bet I would not be sitting here...I'd see Cahill immediately in NY.